CN107262580B - Drawing method and drawing device - Google Patents

Drawing method and drawing device Download PDF

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Publication number
CN107262580B
CN107262580B CN201710498923.8A CN201710498923A CN107262580B CN 107262580 B CN107262580 B CN 107262580B CN 201710498923 A CN201710498923 A CN 201710498923A CN 107262580 B CN107262580 B CN 107262580B
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China
Prior art keywords
workpiece
punch
female die
manipulator
control assembly
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CN201710498923.8A
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CN107262580A (en
Inventor
励建炬
邹国锦
吴斌
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Shenzhen Kedali Industry Co ltd
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Shenzhen Kedali Industry Co ltd
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20Deep-drawing
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D45/00Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
    • B21D45/02Ejecting devices
    • B21D45/04Ejecting devices interrelated with motion of tool

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

The invention discloses a drawing method and a drawing device. In the drawing method, a workpiece is pressed into a female die downwards under the action of a punch and is removed from the lower part of the female die after drawing and forming. The drawing method eliminates the operation of ejecting the workpiece upwards, and avoids the secondary reverse drawing of the workpiece by moving out the workpiece below the female die, thereby ensuring the flatness of the bottom surface and the side surface of the workpiece and ensuring the processing quality of the workpiece.

Description

Drawing method and drawing device
Technical Field
The invention relates to the technical field of drawing, in particular to a drawing method and a drawing device.
Background
Drawing, also called drawing, stretching, calendaring, etc., refers to a machining process that uses a die to stamp a blank obtained after blanking into various open hollow parts or reduce the diameter and increase the height of the open hollow blank. The drawing process can be used for manufacturing thin-wall parts in cylindrical, stepped, conical, spherical, box-shaped and other irregular shapes, and the drawing process is matched with other stamping forming processes such as flanging, bulging, flaring, necking and the like, so that parts with extremely complex shapes can be manufactured. Therefore, the drawing process plays a very important role in the production process of industrial departments such as automobiles, airplanes, electric appliances, instruments, electronics and the like.
As shown in fig. 1 to 3, in the conventional drawing process, when the workpiece 5 'is drawn by the final forming process, the workpiece 5' is drawn twice in the die, namely, the punch 1 'presses the workpiece 5' into the die 2 'and the punch 1' and the ejection cylinder 3 'are simultaneously moved upwards, the ejection cylinder 3' ejects the workpiece 5 'out of the die 2' and performs the secondary reverse drawing, and the workpiece 5 'is ejected and then moves out from above the die 2'. The second reverse drawing easily causes reverse drawing of the bottom of the workpiece 5 ', thereby causing uneven sides and bottom surfaces of the workpiece 5 ', and causing disqualification of the workpiece 5 '.
Disclosure of Invention
A first object of the present invention is to propose a drawing method which can avoid the secondary reverse drawing of a workpiece, thereby improving the quality of the workpiece.
To achieve the purpose, the invention adopts the following technical scheme:
a drawing method includes such steps as pressing workpiece downward into die by punch, drawing, and removing workpiece from the lower part of die.
The workpiece is positioned below the female die after deep drawing, and the discharging device positioned below the female die is matched with the punch head to enable the punch head to move upwards to be separated from the workpiece; and the unloading device drives the workpiece to move out from the lower part of the female die.
When the punch and the workpiece are separated, the unloading device stops the workpiece from moving upwards along with the punch.
A second object of the present invention is to provide a drawing apparatus that can avoid secondary reverse drawing of a workpiece, thereby improving the quality of the workpiece.
To achieve the purpose, the invention adopts the following technical scheme:
a drawing apparatus comprising:
the punch and the female die are matched to realize the deep drawing forming of the workpiece;
the lower material supporting mechanism is used for supporting the workpiece, is positioned below the female die and can move along the drawing direction of the workpiece;
the discharging device is positioned below the female die;
and the control assembly is used for controlling the punch and the unloading device to act, and after the workpiece is formed by deep drawing, the control assembly controls the unloading device to move the workpiece out from the lower part of the female die.
After the workpiece is deep-drawn and formed, the workpiece completely passes through the female die, and a first gap is reserved between the upper surface of the workpiece and the lower surface of the female die.
The discharging device comprises a discharging fork arranged on the lower surface of the female die, the discharging fork can slide along the surface of the female die to achieve inward shrinkage or outward opening of the discharging fork, the discharging fork is electrically connected with the control assembly, after the workpiece is deep-drawn and formed, the control assembly controls the discharging fork to shrink inwards and stretch into the first gap, the discharging fork and the punch are provided with a second gap along the expansion direction of the discharging fork, and the control assembly controls the punch to move upwards to enable the workpiece to be separated from the punch.
The discharging device further comprises a manipulator, the manipulator is located at the outer side of the area between the lower material supporting mechanism and the female die, the manipulator can horizontally move and retract inwards, the manipulator is electrically connected with the control assembly, the workpiece is located at the inner side of the manipulator after deep drawing, and the control assembly controls the manipulator to retract inwards to clamp the workpiece and move out from the lower portion of the female die.
Before the workpiece and the punch are completely separated, the control assembly controls the manipulator to clamp the workpiece, after the workpiece and the punch are completely separated, the unloading fork is opened, and the manipulator clamps the workpiece to move out from the lower part of the female die.
The discharging device further comprises a conveying belt, the conveying belt is located on one side of the lower supporting mechanism, and the manipulator clamps the workpiece and places the workpiece on the conveying belt.
The lower material supporting mechanism comprises an air cylinder and a supporting plate connected with a piston rod of the air cylinder, and the supporting plate is used for supporting the workpiece.
The beneficial effects are that: the invention provides a drawing method and a drawing device. In the drawing method, a punch presses a workpiece downwards into a female die and after drawing and forming, the workpiece is moved out from below the female die. The drawing method eliminates the operation of ejecting the workpiece upwards, and avoids the secondary reverse drawing of the workpiece by moving out the workpiece below the female die, thereby ensuring the flatness of the bottom surface and the side surface of the workpiece and ensuring the processing quality of the workpiece.
Drawings
FIG. 1 is a schematic view of a prior art structure of a work piece in an initial state of deep drawing;
FIG. 2 is a schematic view of a prior art drawing of a workpiece;
FIG. 3 is a schematic view of a prior art structure of a workpiece in an ejected state;
fig. 4 is a flowchart of a drawing method provided in embodiment 1 of the present invention;
fig. 5 is a schematic view of the drawing apparatus according to embodiment 2 of the present invention when a workpiece is drawn;
fig. 6 is a schematic view of the structure of the drawing apparatus according to embodiment 2 of the present invention when the workpiece is separated from the punch;
fig. 7 is a schematic view of the drawing apparatus according to embodiment 2 of the present invention when a workpiece is removed.
Wherein:
1. a punch; 2. a female die; 3. a blanking and supporting mechanism; 31. a piston rod; 32. a supporting plate; 4. a discharging device; 41. a manipulator; 42. a conveyor belt; 43. a discharge fork; 5. a workpiece;
1', a punch; 2', a female die; 3', an ejection cylinder; 5', workpiece.
Detailed Description
In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the invention more clear, the technical scheme of the invention is further described below by a specific embodiment in combination with the attached drawings.
Example 1
As shown in fig. 4, the present embodiment provides a drawing method in which a punch 1 presses a work piece 5 downward into a die 2 and after drawing forming, the work piece 5 is removed from under the die 2. The drawing method in this embodiment cancels the operation of ejecting the workpiece 5 upward, and by removing the workpiece below the die 2, the secondary reverse drawing of the workpiece 5 is avoided, thereby ensuring the flatness of the bottom surface and the side surface of the workpiece 5, and ensuring the processing quality of the workpiece 5.
Specifically, the workpiece 5 is pressed into the female die 2 to be gradually stretched, after the workpiece 5 is stretched and formed, namely, the drawing is completed, the workpiece 5 is positioned below the female die 2, and the discharging device 4 positioned below the female die 2 is matched with the punch 1, so that when the punch 1 moves upwards, the discharging device 4 stops the workpiece 5 from moving upwards along with the punch 1, the workpiece 5 is always positioned below the female die 2, the punch 1 and the workpiece 5 are separated, and the workpiece 5 is driven to move out from the lower side of the female die 2 through the discharging device 4. The whole process is matched with the punch head 1 through the discharging device 4, so that the operation is simple, the corresponding mechanical operation is facilitated, the automation or semi-automatic control is convenient to realize, and the manufacturing efficiency of the workpiece 5 is improved.
Example 2
As shown in fig. 5 to 7, the present embodiment provides a drawing device applying the drawing method in embodiment 1, which includes a punch 1, a die 2, a lower supporting mechanism 3, a discharging device 4 and a control component, wherein the punch 1 and the die 2 cooperate to realize drawing forming of a workpiece 5; the lower material supporting mechanism 3 is used for supporting the workpiece 5, and the lower material supporting mechanism 3 is positioned below the female die 2 and can move along the drawing direction of the workpiece 5; the discharging device 4 is positioned below the female die 2; the control component is used for controlling the punch 1 and the discharging device 4 to act, and after the workpiece 5 is drawn and formed, the control component controls the discharging device 4 to move the workpiece 5 out from the lower part of the die 2.
When the drawing device provided by the embodiment is used for drawing a workpiece, the operation of ejecting the workpiece 5 upwards can be canceled, and the workpiece 5 is removed below the die 2, so that the secondary reverse drawing of the workpiece 5 is avoided, the flatness of the bottom surface and the side surface of the workpiece 5 is ensured, and the processing quality of the workpiece 5 is ensured.
Specifically, the lower material supporting mechanism 3 comprises a cylinder and a supporting plate 32 connected with a piston rod 31 of the cylinder, the supporting plate 32 is used for supporting the workpiece 5, the stability of the workpiece 5 in the drawing process can be guaranteed, meanwhile, when the punch 1 presses the workpiece 5 downwards, the resistance of the cylinder is overcome, and good forming force can be provided for the workpiece 5, so that the drawing forming of the workpiece 5 is realized. As shown in fig. 5, when drawing, the workpiece 5 is placed on the pallet 32, and the piston rod 31 is extended so that the pallet 32 is flush with the upper surface of the die 2, the punch 1 presses the workpiece 5 downward from above and gradually presses the workpiece 5 into the die 2, the die 2 restricts the shape of the workpiece 5 to obtain a workpiece 5 of a specific size, and the workpiece 5 is positioned below the die 2 after the workpiece 5 is drawn.
The discharging device 4 comprises a discharging fork 43 arranged on the lower surface of the female die 2, the discharging fork 43 can slide along the surface of the female die 2 to realize inward shrinkage or outward opening of the discharging fork 43, the discharging fork 43 is electrically connected with a control assembly, and the control assembly controls the discharging fork 43 to move with the punch 1 so as to realize separation of the workpiece 5 and the punch 1 and prevent the workpiece 5 from being stuck on the surface of the punch 1. In order to facilitate the detachment of the workpiece 5 from the punch 1 after the drawing forming, after the drawing forming of the workpiece 5, in order to facilitate the detachment of the workpiece 5 from the punch 1 by the cooperation of the unloading fork 43 and the punch 1, the workpiece 5 completely passes through the die 2, and the upper surface of the workpiece 5 and the lower surface of the die 2 have a first gap.
As shown in fig. 6, after the workpiece 5 is drawn and formed, the control assembly controls the discharge fork 43 to retract inwards to extend into the first gap so that the discharge fork 43 is positioned above the workpiece 5, and when the control assembly controls the punch 1 to move upwards, the discharge fork 43 blocks the workpiece 5 from moving along with the punch 1 so as to separate the punch 1 from the workpiece 5; in order to avoid friction between the discharging fork 43 and the surface of the punch 1 and prevent the punch 1 from moving upwards, the discharging fork 43 and the punch 1 are provided with a second gap along the extending and retracting direction of the discharging fork 43, the size of the second gap can be set according to the thickness of the side wall of the workpiece 5, the wall thickness of the workpiece 5 and the moving convenience of the punch 1 are comprehensively considered, the second gap is set to be 0.1-0.2mm, and the second gap can be adjusted to be 0.1mm or 0.2mm according to actual needs.
As shown in fig. 7, the unloading device 4 further includes a manipulator 41, the manipulator 41 is located at the outer side of the area between the lower supporting mechanism 3 and the female die 2, the manipulator 41 can horizontally move and retract inwards, the manipulator 41 is electrically connected with a control component, the workpiece 5 is located at the inner side of the manipulator 41 after being deep-drawn and formed, and the control component controls the manipulator 41 to retract inwards to clamp the workpiece 5 and move out from the lower side of the female die 2. Before the workpiece 5 is completely separated from the punch 1, the control assembly controls the manipulator 41 to clamp the workpiece 5 so as to remove the workpiece 5; after the workpiece 5 is completely separated from the punch 1, the discharge fork 43 opens, and the manipulator 41 clamps the workpiece 5 and removes the workpiece 5 from below the die 2.
The unloading device 4 further comprises a conveying belt 42, the conveying belt 42 is located on one side of the lower material supporting mechanism 3, the mechanical arm 41 clamps the workpiece 5 and places the workpiece 5 on the conveying belt 42, and the workpiece 5 is conveyed to a designated position through the conveying belt 42, so that subsequent processing is facilitated.
The foregoing is merely exemplary of the present invention, and those skilled in the art should not be considered as limiting the invention, since modifications may be made in the specific embodiments and application scope of the invention in light of the teachings of the present invention.

Claims (2)

1. A drawing method based on a drawing apparatus, characterized in that the drawing apparatus comprises:
the punch (1) and the die (2) are matched to realize deep drawing forming of a workpiece (5);
the lower material supporting mechanism (3) is used for supporting the workpiece (5), the lower material supporting mechanism (3) is positioned below the female die (2) and can move along the drawing direction of the workpiece (5), the lower material supporting mechanism (3) comprises an air cylinder and a supporting plate (32) connected with a piston rod (31) of the air cylinder, the supporting plate (32) is used for supporting the workpiece (5), and the supporting plate (32) is used for supporting the workpiece (5) to ensure the stability of the workpiece (5) in the drawing process;
the discharging device (4) is positioned below the female die (2);
the control assembly is used for controlling the punch (1) and the discharging device (4) to act, and after the workpiece (5) is deep-drawn and formed, the control assembly controls the discharging device (4) to move the workpiece (5) out from the lower part of the female die (2);
after the workpiece (5) is deep-drawn and formed, the workpiece (5) completely passes through the female die (2), and a first gap is reserved between the upper surface of the workpiece (5) and the lower surface of the female die (2);
the discharging device (4) comprises a discharging fork (43) arranged on the lower surface of the female die (2), the discharging fork (43) can slide along the surface of the female die (2) to realize inward shrinkage or outward opening of the discharging fork (43), the discharging fork (43) is electrically connected with the control assembly, when the workpiece (5) is deep-drawn and molded, the control assembly controls the discharging fork (43) to shrink inwards and stretch into the first gap, and the discharging fork (43) and the punch (1) have a second gap along the expansion direction of the discharging fork (43), and the control assembly controls the punch (1) to move upwards to separate the workpiece (5) from the punch (1);
the discharging device (4) further comprises a manipulator (41), the manipulator (41) is positioned at the outer side of the area between the lower material supporting mechanism (3) and the female die (2), the manipulator (41) can horizontally move and retract inwards, and the manipulator (41) is electrically connected with the control assembly;
the drawing method comprises the following steps:
the punch (1) overcomes the resistance of the cylinder when extruding the workpiece (5) downwards, and provides better forming force for the workpiece (5);
the workpiece (5) is positioned on the inner side of the manipulator (41) after deep drawing, and the control assembly controls the manipulator (41) to retract inwards to clamp the workpiece (5) and move out from the lower part of the female die (2);
before the workpiece (5) is completely separated from the punch (1), the control assembly controls the manipulator (41) to clamp the workpiece (5), and after the workpiece (5) is completely separated from the punch (1), the discharging fork (43) is opened.
2. The drawing method as claimed in claim 1, characterized in that the discharge device (4) further comprises a conveyor belt (42), the conveyor belt (42) being located on one side of the blanking mechanism (3), the robot arm (41) gripping the workpiece (5) and placing the workpiece (5) on the conveyor belt (42).
CN201710498923.8A 2017-06-27 2017-06-27 Drawing method and drawing device Active CN107262580B (en)

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Application Number Priority Date Filing Date Title
CN201710498923.8A CN107262580B (en) 2017-06-27 2017-06-27 Drawing method and drawing device

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Application Number Priority Date Filing Date Title
CN201710498923.8A CN107262580B (en) 2017-06-27 2017-06-27 Drawing method and drawing device

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CN107262580A CN107262580A (en) 2017-10-20
CN107262580B true CN107262580B (en) 2023-09-22

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1190547A (en) * 1997-09-18 1999-04-06 Asahi Seiki Mfg Co Ltd Method for drawing with transfer press and transfer press
CN2327469Y (en) * 1998-04-23 1999-07-07 南海市黄岐良奇钢瓶总厂 Direct releasing mould for pressing stoppers of steel cylinders
CN104384324A (en) * 2014-10-09 2015-03-04 昆山煌佳精密模具有限公司 Deep drawing die
CN104985082A (en) * 2015-07-22 2015-10-21 太仓斯普宁精密机械有限公司 Mold discharging device
CN105689484A (en) * 2016-03-25 2016-06-22 浙江德福精密驱动制造有限公司 Automatic blanking stamping machine
CN106077284A (en) * 2016-06-14 2016-11-09 芜湖同创模具机械有限公司 A kind of automatic control system of the casted die mould of automatic loading/unloading
CN206241059U (en) * 2016-10-14 2017-06-13 江西江铃底盘股份有限公司 A kind of U-board spring bracket supporting plate Multi-station synchronous processing mold
CN207013591U (en) * 2017-07-14 2018-02-16 深圳市科达利实业股份有限公司 A kind of drawing die

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1190547A (en) * 1997-09-18 1999-04-06 Asahi Seiki Mfg Co Ltd Method for drawing with transfer press and transfer press
CN2327469Y (en) * 1998-04-23 1999-07-07 南海市黄岐良奇钢瓶总厂 Direct releasing mould for pressing stoppers of steel cylinders
CN104384324A (en) * 2014-10-09 2015-03-04 昆山煌佳精密模具有限公司 Deep drawing die
CN104985082A (en) * 2015-07-22 2015-10-21 太仓斯普宁精密机械有限公司 Mold discharging device
CN105689484A (en) * 2016-03-25 2016-06-22 浙江德福精密驱动制造有限公司 Automatic blanking stamping machine
CN106077284A (en) * 2016-06-14 2016-11-09 芜湖同创模具机械有限公司 A kind of automatic control system of the casted die mould of automatic loading/unloading
CN206241059U (en) * 2016-10-14 2017-06-13 江西江铃底盘股份有限公司 A kind of U-board spring bracket supporting plate Multi-station synchronous processing mold
CN207013591U (en) * 2017-07-14 2018-02-16 深圳市科达利实业股份有限公司 A kind of drawing die

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